Improvement in sewing-machines



r w I v '1. JLVSIBL-EY.

j Sewing Machine.

No. 48,248. 1 Patented June 13, 1865.

g UNITED STATES PATENT OFFICE.

. JOHN J. SIBLEY, OF N EW YORK, N. Y., ASSIGNOR TO BRUEN MANUFACTURINGCOMPANY, OF NEW YORK STATE.

IMPROVEMENT-IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 48,248, dated June 13,1865.

To all whom it mag concern.-

Be it known thatlI, JOHN J. SIBLEY, of the city, county, and State ofNew York, have invented a new and useful Improvement in Sewing-Machines;and I hereby declare that the following is a full, clear, and exactdescription thereof, reference being had to the accompanying drawings,making a part of this specification, and the letters of reference markedthereon, in which the same letter represents the same thing in eachfigure.

Figure l is a side view of the addition to a Wheeler 82; Wiisonsewing-machine in which my improvement consists. Fig. 2 is a top viewthereof. Fig. 3 is a section of the stand supportingthe under-threadcarrier. Figs. 4 and 5 represent the parts of an ordinary Wheeler &Wilson sewing-machine, sufficient to show the operation of myimprovement therewith; Fig. 6, the step of the sh aft of theunder-thread carrier. 7

(t represents the frame of my new attachment; 1), the thumb-nutregulating the tension of the under thread; 0, the regulating-pin thatcontrols the distance at which the attachment shall stand from the faceof the rotating hook c, the point of arm 1,- d, the under-threadcarrier; e, the shaft to which the under-thread carrier is secured; f,the stand supporting the under-thread carrier and its shaft; g, one ofthe arms operating the under-thread carrier; h, the connection betweenthe under-thread carrier and arm 9 13, the shaft that supports arms 9and l j, the ring-slide 7c, the tensionspring; is, the bobbin asordinarily in use in the Wheeler 85 Wilson machine; Z, the arm actuatingthe under-thread carrier and arm 9, re-

ceiving its motion from the ordinary feed-cam in a Wheeler 85 Wilsonsewing-machine; m, the spring that returns the under-thread carrier toits position; n, the post that supports the under tension; 0,theuuder-spool spindle; 0, the tongue on the base of frame a, whichslides into the ring-slide groove of a Wheeler & Wilson machine; p, theframe supporting the under tension and spool-spindle; q, the screw thatsecures frame 19 to frame a; r, the screw that regulates the play of arm9; s, the top surface of the under-thread tension; t, the bottom surfacethereof; a, the check-nut of the step that supports shaft t; t, the stepthereof w, the screw that secures the under-thread carrier in shaft e.r, the spring under the step of shaft 0; y, the step between the springto and shaft 6, on which shaft 0 rests; z, the ringslide groove of theordinary Wheeler 85 Wilson machine; 2, the needle; 1), the rotary hook.

The purpose of my improvement is to enable a Wheeler 85 Wilsonsewing-machine to make the three or more threaded stitch described in mypending application before theUnited States Patent Office for a patenttherefor, the first thread being carried by the needle, the second bythe bobbin of that machine, and the third by the thread-carrier d ofmyimproved attachment. This is accomplished as follows: U11- screw thethumb-screw that secures the ringslide of a Wheeler & Wilson machine inplace.

Remove the ring-slide and put the attachment on in its place, the tongue0 of the attachment being made to slide in ring-slide groove 2 of themachine. The ring-slide thumb-screw of the machine will secure theattachment in place, ringslidej of the attachment, secured to the standf, taking the place of the removed ringslide of the machine, and havingthe same operative relations to bobbin 7c and rotating hook p of theWheeler 8: Wilson machine that the removed ring-slide of the machinehas. Motion is communicated to the under-thread carrier in one directionthrough the arm land arm g, connection h, and shaft 0 from the feed-camof the Wheeler 81; Wilson machine, bearing directly upon arm I at point0, and in the opposite.dir ection by the spring m.

The operation will be as follows: Needle z descends with its threadthrough the material.

When theloop of needlethread has been caught and spread upon therotating hook, as usual in the Wheeler & Wilson machine, and the needleretracted, the under thread carrier passes through said loop ofneedle-thread, carrying its own thread back of the track of the needle,thus introducing a loop of under-thread through a loop of needle-thread,in which position it remains until the needle has again descended,carrying its own thread through the loop of under-thread. While therotatin g hook is securing and spreading this second loop ofneedlethread the under-thread carrier dis withdrawn from the first loopof needle-thread, and immediately enters the second loop ofneedle-thread while it is yet spread upon the rotating hook, and carriesits own thread across the track of the needle, as before. The needle andbobbin threadsbeinginterlaced,asusualintheWheeler & Wilson machine thethird, or under thread carrier-thread is drawn up by the needle-threadto the cloth and tension plates .9 and t, between which the threadpasses to keep it taut. Shaft e rests upon step 3 and step 3 is held upagainst the bottom of shaft e by spiral spring as, the step having twosmall ears projecting out through the slots 11 in stand f, which keepsthe step g from reciprocating with shaft 0. By pressing down uponthread-carrier d spiral spring as closes up and permits thread-carrier dto fall until it disconnects from arm g, and itmaythcnbeswungroundfromundcrtheclothplate of a Wheeler 85 Wilson machine, sothat the eyes of the thread-carrier can be easily got at to thread. Thecars of the step bear against the top of the slot t" in stand j, whichprevents the spring from pushing it so high as to bind shaft e. Two ormore threads may be placed in the bobbin and thread carriers, so as tosecure a variety of colors when desired.

I do not claim, broadly, a sewing-machine so constructed as to form athree-threaded and other operative parts of a Wheeler & Wilsonsewing-machine, except the ring-slide.

3. The rin g-slidej, constructed and operating substantially asdescribed.

4. The combination of needle 2, bobbin 7c, thread-carrier d, andring-slidej, constructed and operating together substantially asdescribed.

5. The step 3 constructed and operating substantially as set forth.

JOHN J; SIBLEY.

Test:

J OHN P. GRAIGHEAD, M. B. ANDRUS.

